Designed by Pierre Vivant, “Traffic Light Tree” has 75 sets of traffic lights.
You can see it in London, UK. Photo

“At a distance of 18,000 km from the earth, the elephant Wursa could
balance on her trunk. It is on the basis of learned scientific calculations that
Daniel Firman reached this conclusion, and came above all
to produce this extraordinary work which confounds all our certainties regarding
the gravitation of bodies.” You can see it in Paris, France. Photo